Finding the Fourth Proportional to 1,281.72, 1,922.17 and 550.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.72 : 1,922.17 = 550.83 : x
2. Step 2: Convert to fraction form
   1,281.72/1,922.17 = 550.83/x
3. Step 3: Cross multiply
   1,281.72x = 1,922.17 × 550.83
4. Step 4: Simplify right side
   1,281.72x = 1,058,788.90
5. Step 5: Solve for x
   x = 1,058,788.90/1,281.72
6. Step 6: Final answer
   x = 826.07